Abstract: Treatise on the drawing of magical squares (with numbers, letters, words, etc.) in three sections (lawḥ). This text is also attributed to Sharaf al-Dīn ʻAlī al-Yazdī (d. 858/1454).Binding note: Red leather over paper boards. Blind-stamped center and corner-pieces, with an outer frame consisting of two double-fillets.Ms. codex.Title from beginning of text (fol. 2a, l. 13).The name of the author appears at the beginning of the text (fol. 2a, l. 7) and in several squares, the latter in the form "ʻamal Yaʻqūb ibn Muḥammad ibn ʻAlī" or "ʻamal Yaʻqūb ibn Muḥammad al-Ṭāʼūsī". See fol. 59a, 66a, 67b, 70a.Physical description: 21 lines per page. Written in nastaʻlīq in black ink with use of red, with squares, tables and circles in red, black and yellow ink. A few tables are left blank. The text is framed within a gold, black and red border, with an outer frame made of a single blue fillet. Simple illuminated headpieces in red and gold on fol. 1b, 35b and 60b. Laid paper ; glossy.Incipit: حمدى بر وفق اعداد نا متناهى مقرون تسبيح افراد وازواج مكوّنات